coot (n.)youdaoicibaDictYouDict[coot 词源字典]
c. 1300, cote, used for various water fowl (now limited to Fulica atra and, in North America, F. americana), of uncertain origin. Compare Dutch meercoet "lake coot." Meaning "silly person, fool" is attested from 1766.[coot etymology, coot origin, 英语词源]